This week's topics include the effects of multivitamins, reusing implanted cardiac devices, sleep and fat, and a new coronavirus.

PodMed is a weekly podcast from Johns Hopkins Medicine. In it, Elizabeth Tracey, director of electronic media for Johns Hopkins Medicine, and Rick Lange, MD, professor of medicine at Johns Hopkins and vice chairman of medicine at the University of Texas Health Science Center at San Antonio, look at the top medical stories of the week.

This week's topics include the effects of multivitamins, reusing implanted cardiac devices, sleep and fat, and a new coronavirus.